When we were kids, our TV was black and white. Greyscale. We could often sense the colours on the screen by the tone and context. We never felt as though anything was missing. But then colour TV came along. The perceptual impact was huge.
Every now and then in meditation or when quiet, I get a glimpse of colours more brilliant than anything I have ever seen in this world. It's as though we are living in a faded world, not black and white, but not fully perceived either.
If we never glimpse the colours that exist outside our reality, how can we know they exist?